Which statement correctly describes the AN6-14A bolt?

• A. AN6-14A is a hex head bolt with a 3/8 inch diameter, 1-1/2 inch length, and the shank is not drilled for a cotter pin.
• B. AN6-14A is a pan head bolt with a 1/2 inch diameter and 2 inch length, drilled for a cotter pin.
• C. AN6-14A is a carriage bolt with a 3/8 inch diameter and 1 inch length, drilled for a cotter pin.
• D. AN6-14A is a socket head bolt with a 3/16 inch diameter and 1-1/4 inch length, not drilled for cotter pin.

Answer: (A)

AN bolt codes give you the key dimensions and features you need to match a part to an application: diameter, grip (length), head style, and whether the shank is drilled for a cotter pin. The designation AN6-14A indicates a 3/8 inch diameter bolt. The dash-number corresponds to the bolt’s grip length, which for this code is about 1-1/2 inches. The suffix A tells you the shank is not drilled for a cotter pin. The head shown is hex head, which is typical for AN bolts used in aviation.

So this description fits a hex head bolt with a 3/8 inch diameter, a length around 1-1/2 inches, and no cotter-pin hole. The other choices describe different head styles (pan, carriage, socket), incorrect diameters or lengths, or indicate drilling for a cotter pin, which doesn’t match this code.